Combining Texts

You have chosen 'The Discourses' by Epictetus, 'Exigency to Exist in Essences' by Gottfried Leibniz and 'Review of 'The Price is Wrong' by B.Christophers' by William Davies

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All the ideas for Science, or select a subheading:
      A. Basis of Science
      B. Scientific Theories
      C. Induction
      D. Explanation